All Fisheries Calculators Related Post

    Total Mortality Calculator Select Estimation Method Catch-Curve (Linear Regression)Chapman-Robson EstimatorHeincke Method Age Classes (comma-separated) Number Caught (same order) Number at full recruitment (N₀) Number of years after full recruitment Number surviving after t years (Nₜ) Total fish caught Number of recruits (age 0 or 1) Calculate Total Mortality (Z) About the Total Mortality […]

    Natural Mortality Calculator Select Estimation Method Hoenig (1983) – LongevityPauly (1980) – Growth & TemperatureJensen (1996) – K-only Maximum Age (tₘₐₓ, years) Asymptotic Length (L∞, cm) Growth Coefficient (K, year⁻¹) Mean Annual Water Temperature (°C) Growth Coefficient (K, year⁻¹) Calculate Natural Mortality (M) About the Natural Mortality Calculator The Natural Mortality Calculator is

    Fishing Mortality Calculator Instant F, Z, M & Survival Rate Total Mortality (Z) – year⁻¹ Natural Mortality (M) – year⁻¹ Catch (tonnes) Average Biomass (tonnes) Calculate Now Enter values and click Calculate The Fishing Mortality Calculator delivers instant, peer-reviewed estimates of Fishing Mortality (F), survival rates, and exploitation using the exact Baranov catch

    Growth Overfishing Calculator Are You Catching Fish Too Young? Average Length at Capture (L₍c₎) – cm Optimal Length for Maximum Yield (Lₒₚₜ) – cm Current Fishing Mortality (F) – year⁻¹ Natural Mortality (M) – year⁻¹ Diagnose Now Enter values and click Diagnose The Growth Overfishing Calculator reveals in 30 seconds if you’re harvesting

    Recruitment Overfishing Calculator Assess Your Fishery in 30 Seconds Spawning Stock Biomass (SSB) – current (tonnes) SSB at Maximum Sustainable Yield (SSBₘₛᵧ) – reference (tonnes) Fishing Mortality (F) – current (year⁻¹) F at Maximum Sustainable Yield (Fₘₛᵧ) – reference Calculate Now Enter values above and click Calculate The Recruitment Overfishing Calculator instantly tells

    Spawner-Recruit Calculator Select Model Ricker (Dome-shaped)Beverton-Holt (Asymptotic)Hockey-Stick (Threshold) Spawner-Recruit Data (SSB, Recruits per line) 100000 1200000<br /> 200000 2200000<br /> 300000 2800000<br /> 400000 3100000<br /> 500000 2900000 Fit Spawner-Recruit Model Load Sample Data Atlantic Cod Pacific Salmon Yellowfin Tuna Download PNG + CSV Fits Ricker, Beverton-Holt, and Hockey-Stick models using nonlinear least

    Ricker Model Calculator α (Intrinsic Growth Rate) β (Density Dependence) Steepness (h) – 0.2 to 1.0 Calculate Ricker Model Reset Pacific Salmon Atlantic Cod Peruvian Anchovy North Sea Herring Download PNG + CSV Based on Ricker (1954): R = αS × e^(-βS). The dome-shaped model for overcompensatory mortality. About the Ricker Model Calculator

    Beverton-Holt Model Calculator α (Maximum Recruitment): β (Density Dependence): Steepness (h): Calculate Beverton-Holt Fit from Data (soon) Atlantic Cod Yellowfin Tuna Pacific Sardine Download Plot Based on Beverton & Holt (1957): R = αS / (1 + βS). Used in 95 % of global stock assessments. About the Beverton-Holt Model Calculator The Beverton-Holt

    Stock Recruitment Calculator Stock-Recruitment Model: Ricker ModelBeverton-Holt ModelShepherd Model α (Productivity): β (Density Dependence): Steepness (h): Calculate * Based on Ricker (1954), Beverton-Holt (1957), Shepherd (1982). Default parameters from typical fishery data. About the Stock Recruitment Calculator The Stock Recruitment Calculator is a scientifically precise fisheries management tool that computes recruitment curves using

    Fisheries Productivity Calculator Model Type: Schaefer (Logistic)Fox (Gompertz) Carrying Capacity K (tons): Intrinsic Growth Rate r (year⁻¹): Initial Biomass B₀ (tons): Current Catch (tons/year): Fishing Effort (units): Calculate Productivity * Based on Schaefer (1954), Fox (1970), and Hilborn & Walters (1992). About the Fisheries Productivity Calculator The Fisheries Productivity Calculator is a scientifically